Process of making ethyl triacetylgallate.



untrue stares KURT ZIMMERMANN, OF'ELBERFELD, GERMANY, ASSIGNOR T0- SYNTI-IE'EIC PATENTS 00., ING, 0F NEXV YORK N. Y.. A CORPORATION OF NEW YORK.

PROCESS OF MAKING ETHYL TEIACETYLG-ALLATE.

No Drawin g.

Triacetylgallate, of which the following is.-

a specification. v My inventionrelates to the manufacture and production of the hitherto unknown esters of the triacetyl gallic acid. They can be obtained by replacing the hydrogens of the oxy groups in the gallic esters by the acetyl group.

The new compounds having most probably the formula:

05 .00.0- --o.oo.om l 1 /r' coca (R meaning an alkyl containing at least two carbon atoms, (3. g. -C H -C H CH COCH have proved to be valu-' Specification of Letters Patent.

, t i o r Pa tented span 019, 1291 Lt,

Application filed January 5, 1914. Serial lilo. MGAB I.

is poured into cold water. A solid powde separates WlHCll has to be well washed and whlch 1s recrystallized from alcohol- The ethylester of the triacetylgallic acid thus obtained forms wlnt1sh, tasteless and odorless crystals (melting point at from. 134-l36 C.) which are insoluble in water, soluble in hot alcohol, diliicultly soluble in cold alcohol and toluene.

In an analogous'inanner the other esters of the triacetylgallic acid are obtained, such as the propyl-ester (whitish powder melting point at about 81 *3.) the acetol-ester (whitish powder melting point at from 10-106 0.)

Instead of the acetic acid anhydrid other acetylizing agents, such as acetylchlorid, etc, can be used.

1. The process of making" ethyl triacetylgallate which comprises boiling ethyl galla'te for about 2 hours with substantially more than the theoretical equivalent oi acetic anhydrid, and then isolating the resulting ethyl triacetylgallate.

2. The process of making ethyl triacetylgallate which comprises boiling about 10 parts of ethyl gallate for about '2 hours with 165 parts of acetic anhydrid, precipitating the resulting ethyl triacetylgallate by pouring the mixture into cold water, recrystaliizing said ester from alcohol.

testimony whereof I llev'e hereunto set my hand in the presence of two subscribing;

witnesses.

KU ZIlvllVEltltD il llli [u en] Witnesses lie-mm lflurnn, fainter lfl 

